See if I were DMing that I would say that even with a vow of silence, your character would still need to communicate, via writing or body language. So get used to doing interpretive dance at the table!
Of course yes :3.. plus OOC communication for actions. I mean, im joking, but I have considered that character concept, but it would require a lot of effort to pull off for a full campaign
We're playing over Discord and I got the quieter one to roleplay and scream "I'M SORRY I'M SORRY!" loud enough that their mom come in and check-in on them. Kinda proud of that one.